Abstract: In a microscope with a motor-driven objective turret, an intermediate position is provided between each two adjacent primary turret positions. This intermediate position enables manual operations to be carried out on the objectives in the objective turret, in a convenient manner, before viewing. Automatic means are provided for switching off the motor in both the primary and the intermediate turret positions.

Abstract: In a microscope, a nosepiece support assembly and a coarse and fine adjustment mechanism in direct operative control of the support assembly, the support assembly including a nosepiece mounting carriage with a depending rod rigid therewith and mounting a cam follower which rides on the edge of a cam, rotation of which is controlled by the adjustment mechanism. The adjustment mechanism in turn includes a reduction gear assembly utilizing dual gear trains and mounted to a cam-mounting shaft externally of the frame of the microscope and housed within a coarse adjustment handwheel for immediate access thereto. One of the gear trains incorporates a compound gear having a torsion spring between the individual gears to enhance gear train interengagement throughout the gear assembly.

Abstract: A drafting apparatus, or macrophotography attachment, for a microscope of the inverted type, the apparatus being arranged to provide an erect and laterally non-reversed image of an object on a drawing-surface, and in the observation plane, or an erect and laterally non-reversed image of a drawing or object at the observation and film planes of a microscope.

Abstract: A marking image control system for a microscope arrangement in which the image of a marking on a mask is reflected into the optical path and combined with an object image of the microscope, the system forming an intermediate image of the marking in order to facilitate shifting of the image of the marking in a film plane or a viewing plane of the microscope.

Abstract: Non-steroidal anti-inflammatory compositions comprising a compound of the formula: ##STR1## wherein R.sub.1 is H or OH; and X, Y, X.sup.1 and Y.sup.1 represent hydrogen or halogen, such as chloro, fluoro, bromo, or iodo radicals, lower alkyl radicals such as C.sub.1 -C.sub.8 radicals, such as methyl, ethyl, propyl and butyl, lower haloalkyl radicals, such as trifluoro, trichloro or tribromo methyl radicals, and lower alkoxy radicals, such as C.sub.1 -C.sub.8 radicals such as methoxy, ethoxy, propoxy, and octyloxy radicals or combinations thereof and the salts thereof, in combination with 3-isobutyl-1-methylxanthine.A method of treating pain and inflammation is also disclosed.

Abstract: Apparatus for cooling a biological or medical specimen comprises a cooling bath, an injection device for injecting a specimen into cooling liquid in the bath at a velocity of between 5 and 15 m/sec, and a sleeve. The sleeve is movable between a lower position in the bath and an upper position for limiting the effects of splashing as a specimen enters the bath. The injection device comprises a closure plate for co-operating with the sleeve to further limit the effects of splashing. The sleeve is operatively associated with the injection device in a manner such that movement of a specimen carrier of the device towards the bath to immerse a specimen is initiated when the sleeve is moved from the lower position to the upper position.

Abstract: Apparatus using a coherent mono-chromatic radiation source, preferably using a laser, for bonding capsule elements is disclosed. The systems described include means for providing a spot, short-line, or continuous seam. Also described are methods to enhance the bonding technique which utilize a small quantity of water or plasticol in the region to be bonded.

Abstract: A current to frequency converter comprising a current source, for example a photocell, a voltage to frequency converter, an integrator in the feedback loop of the converter, the current source being connected to the summing junction of the converter and integrator such that the frequency of output pulses from the converter is directly proportional to the magnitude of current injected from the converter to the summing junction, and a controlled circuit for attenuating the current injected from the converter to the summing junction to increase the frequency of output pulses. The controlled attenuating circuit includes a transistor switching arrangement for introducing increased resistance in the path for current injected from the converter to the summing junction in response to the presence of a control signal.

Abstract: A cryostat microtome apparatus comprises a cooling enclosure which can be set to a predetermined internal temperature and a microtome disposed in the enclosure. The enclosure is supported on a support assembly which is vertically adjustable to permit stepless adjustment of the height of the enclosure, for adaptation to operator requirements. A mechanical actuating assembly and/or a gas spring assembly is provided for height adjustment of the apparatus.

Abstract: Cryogenic-fixation apparatus comprises a light source, a beam from which enter cooling liquid in a bath, through a window in the underside of the bath. The beam can be directed upwardly by means of a reflecting prism. When a lid of the bath is closed, the beam leaves the space defined by the path through an exit port in the lid, and is incident upon a specimen mounted on a specimen holder located above the exit port, the specimen holder being secured to an injector rod.

Abstract: In an optical deflecting device with an optical bridge and with two optical sub-units which can be rotated relative to the optical bridge, the optical sub-units are, in the datum position, aligned in a manner such that the optical entrance axis of the first optical sub-unit is substantially perpendicular to the optical exit axis of the second optical sub-unit and substantially parallel to the optical axis of the optical bridge. This arrangement enables a light beam to be deflected without altering the orientation of the image.

Abstract: Methods are disclosed for the sealing of gelatin capsules having hard shell coaxial cap and body parts which overlap when telescopically joined. Also described are apparatus and sealing fluids to seal the capsules.

Abstract: A magnetic coupling comprises two parts of an optical instrument, for example, of a microscope, which are to be releasably coupled together. A locating surface is formed on one part, this surface comprising one or more areas defined by bodies composed of a magnetic material which are spaced apart at intervals, the other part comprising a locating surface comprising areas defined by bodies composed of a material which can be magnetized. In order to avoid mechanical shocks caused by a powerful magnetic attraction as the parts are coupled, the material which can be magnetized, and which is associated with one of the locating surfaces, is confined to one or more areas of this surface, the arrangement of these areas corresponding to that of the areas on the locating surface. Other parts of the locating surface are composed of a material which cannot be magnetized.

Abstract: An apparatus for the application of controlled combinations of temperature, vacuum, pressure and time to seal capsules is disclosed. Also described are methods to seal capsules and to enhance the bonding of the sealed capsules.

Abstract: An exposure and camera control system comprising a keyboard for providing input information relating to film parameters and camera type, a light to frequency converter for providing signals having a frequency proportional to the intensity of light to be used in exposing the film, and a control operatively connected to the information providing keyboard and to the light to frequency converter for determining the film exposure time and for providing signals for controlling film exposure to light and signals for controlling film transport when the exposure is complete. The control includes a microprocessor, programmable memory, and input/output interface components. A display operatively connected to the control provides visual display of information inputs to the control and of calculated quantitites such as exposure time. A printer operatively connected to the control provides a hard copy record of the displayed information.

Abstract: A microtome, in particular an ultramicrotome, has a drive-control system by which the movement of the specimen arm, relative to the knife, is subdivided into a comparatively slow cutting movement and a more rapid return movement. The drive-control system gradually decelerates the specimen arm at the transition, from the comparatively rapid return movement to the slower cutting movement, so that a jerk, which would generate mechanical vibrations in the drive system, is avoided and the specimen arm is smoothly decelerated from the comparatively high speed to the lower speed.